• molecules
  • Direct analysis in real time (DART) is an atmospheric pressure ion source that operates by exposing the sample to a gas stream (typically helium or nitrogen) that contains long-lived electronically or excited neutral atoms, vibronically excited molecules. (gre.ac.uk)
  • This opened up the potential for a wide variety of fluid applications, including the detection of single molecules in liquids at room-temperature and detection methods for capillary electrophoresis. (wikipedia.org)
  • The limited accessibility of stationary phase pore volume for the polymer molecules results in shorter elution times for high-molecular-mass species. (wikipedia.org)
  • Chemistry
  • D. C. Turnell and J. D. H. Cooper, "Automated preparation of biological samples prior to high pressure liquid chromatography: Part I- The use of dialysis for deproteinizing serum for amino-acid analysis," Journal of Automatic Chemistry , vol. 7, no. 4, pp. 177-180, 1985. (hindawi.com)
  • They have explored a wide-ranging variety of problems in physical chemistry and chemical analysis including examination of heterogeneous structures in mineral samples, the contents of cells and subcellular compartments, and the chemical analysis of liquid samples. (wikipedia.org)
  • fraction
  • By dissolving a polymer an insoluble high molar mass fraction may be filtered off resulting in a large reduction in Mm and a small reduction in Mn thus reducing dispersity. (wikipedia.org)
  • determination
  • M ¯ n = ∑ i N i M i ∑ i N i {\displaystyle {\bar {M}}_{n}={\frac {\sum _{i}N_{i}M_{i}}{\sum _{i}N_{i}}}} The number average molecular mass of a polymer can be determined by gel permeation chromatography, viscometry via the (Mark-Houwink equation), colligative methods such as vapor pressure osmometry, end-group determination or proton NMR. (wikipedia.org)
  • method
  • A method for making a liquid-chromatography apparatus includes inserting two inner conduits into an intermediate tube, inserting the intermediate tube into an outer tube, forming a proximal seal between the intermediate tube and at least one of the inner conduits, and forming a distal seal between the intermediate tube and at least one of the inner conduits. (patentsencyclopedia.com)
  • tumor
  • It has been noted that ornithine decarboxylase (ODC) exhibits high activity in tumor cells, promoting cell growth and division, while absence of ODC activity leads to depletion of putrescine, causing impairment of RNA and DNA synthesis. (wikipedia.org)
  • sensitivity
  • Accurate mass measurements to determine elemental composition, high sensitivity MS and MS/MS measurements. (gre.ac.uk)
  • Because of the minimal contributions from non-faradaic currents, the use of a differential current plot instead of separate forward and reverse current plots, and significant time evolution between potential reversal and current sampling, high sensitivity screening can be obtained utilizing SWV. (wikipedia.org)
  • chemical
  • Materials MASINT involves the collection, processing, and analysis of gas, liquid, or solid samples, is critical in defense against chemical, biological, and radiological threats (CBR), or nuclear-biological-chemical (NBC), as well as more general safety and public health activities. (wikipedia.org)
  • single
  • The absence of functionally important polymorphisms in the COX-2 gene may suggest that there has been selective pressure against those single nucleotide polymorphisms because of the critical role of this enzyme in maintenance of homeostasis. (aspetjournals.org)
  • levels
  • The highest levels were found in the hypothalamus (125 pg/g tissue), pituitary (190 pg/g tissue), spinal cord (199 pg/g tissue), and lower levels were found in cortex (60 pg/g tissue). (ahajournals.org)
  • The first indication for this theory came from finding high levels of pollen in the collected samples, giving the substance its yellow color. (wikipedia.org)
  • Another important mechanism for ethyl carbamate formation in alcoholic beverages is the reaction from cyanide as precursor, which causes comparably high levels in spirits derived from cyanogenic plants (i.e. predominantly stone-fruit spirits and cachaça). (wikipedia.org)
  • fluid
  • 24. The apparatus of claim 22, further comprising a fluidic interface disposed at the interface between the liner tube and the optical conduit to provide a fluid passageway in communication with the liquid in the liner tube. (patentsencyclopedia.com)
  • Analysis
  • It is also useful for analysis of high mass species that form multiply charged ions with ESI (such as proteins, peptides) due to the post-acquisition de-convolution capability of the operating software. (gre.ac.uk)
  • Sumudu D L L6B Monday, October 21, 2002 Analysis of amino acids by paper chromatography Introduction- Proteins may be thought of natural polymers of amino acids, as the composition of proteins is of amino acids. (markedbyteachers.com)
  • include
  • These places include: Hewitt's, The Pin-O-Rama in Oswego, S.U. frat blasts, Carlsys, The Turn On in Downtown Syracuse, and other local high school dances. (wikipedia.org)
  • The most common detectors used for size exclusion chromatography include online methods similar to the bench methods used above. (wikipedia.org)
  • range
  • Molecular sieving using Sephadex G-25 with acetic acid revealed a distinct peak in the 1000 MW range and a smaller, higher molecular weight peak which needs further investigation. (ahajournals.org)
  • advantage
  • The high degree of interconnectivity in monoliths confers an advantage seen in the low backpressures and readily achievable high flow rates. (wikipedia.org)
  • resolution
  • A licence fee will be charged for any media (low or high resolution) used in your project. (sciencephoto.com)
  • As mentioned previously, particle sizes are decreasing in an attempt to achieve higher resolution and faster separations, which led to higher backpressures. (wikipedia.org)
  • found
  • It was also found that jungle bees in this area fly collectively in great numbers, at altitudes too high to be easily seen, producing showers of feces that could have been mistaken for sprays from aircraft. (wikipedia.org)
  • provide
  • These pores provide monoliths with high permeability, a large number of channels, and a high surface area available for reactivity. (wikipedia.org)